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diffusion pump oil diy alternative?

When making a diffusion pump what size holes on the 'chimeneys' do you need?

I cannot see it di ...		 19-1-2023 at 07:18
by: yobbo II
Looking for an online resource that contains large amounts of solubility data


See the Solubility Data Series (SDS) A number of volumes with solubility data.

https://sr ...		 13-1-2023 at 17:00
by: yobbo II
Suitable manometer


A gauge that reads from zero to about 30 Torr would be fine AFAIK.
Some vacuum distilations are ...		 13-1-2023 at 16:58
by: yobbo II
Welch duoseal 1397
Cranked up the pump and measured the vacuum using an old home made McLeod gauge of iffy internal dim ...		 12-1-2023 at 17:20
by: yobbo II
diffusion pump oil diy alternative?

There is a read on diffusion pump oils here:

http://www.belljar.net/tBJ_First_Five_Years.pdf

...		 12-1-2023 at 17:17
by: yobbo II
chlorate cell
I need some help:

Try here
http://www.chlorates.exrockets.com/chlorate.html


Yob 		5-1-2023 at 12:07
by: yobbo II
diffusion pump oil diy alternative?


Have you tried using the pump yet.

A diffusion pump is on my list..........


There is a t ...		 21-12-2022 at 19:00
by: yobbo II
Very cheap 400KV,DC HV generator
They are like a flyback transformer from an old (tube type) TV set.

Yob 		20-12-2022 at 18:08
by: yobbo II
Welch duoseal 1397

My pump is old. It was purchased in about 1986 and was second hand. An exploded diagram of older ...		 15-12-2022 at 17:41
by: yobbo II
Welch duoseal 1397

My pump is old. It was purchased in about 1986 and was second hand. An exploded diagram of older ...		 15-12-2022 at 17:40
by: yobbo II
Lead Nitrate to Lead Chloride


http://www.sciencemadness.org/talk/viewthread.php?tid=5490

try here

Yob 		8-12-2022 at 17:43
by: yobbo II
Catboy Chemical Society


and you have had your hands in the malachite jar too

Yob 		8-12-2022 at 17:42
by: yobbo II
Welch duoseal 1397

Hello,

Pictured is the 'end plate' of the 1397 vacuum pump and also the body showing the vanes ...		 21-11-2022 at 18:38
by: yobbo II
Is induction heating still effective with molten copper ?

Also if you were using a metal container of some sort (iron/steel) to hold the copper, would the i ...		 21-11-2022 at 18:19
by: yobbo II
Unfamiliar Microscope

Is there two objectives on the bottom of the scope (turn it up).

Yob 		16-11-2022 at 17:34
by: yobbo II
Welch duoseal 1397
Thanks for the help.

I had to laugh. I emailed a company that was selling/supplying parts for Wel ...		 11-11-2022 at 17:28
by: yobbo II
Welch duoseal 1397
THanks for reply.
I found another exploded diagram that shows the valve.

What is its function?
...		 10-11-2022 at 04:38
by: yobbo II
Welch duoseal 1397
Hello,
I have a dismantled a Welch duoseal 1397 vacuum pump. There is a bellows controlled valve in ...		 9-11-2022 at 18:05
by: yobbo II
Using a(n Ag) mirror RBF to carry out reaction with fused alcali

You can plate tantalum onto reaction vessells but that is not your original question.

Something ...		 29-10-2022 at 14:25
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase


Thanks,

I cannot check anything as I don't own the generator yet and it is online.

I had n ...		 29-10-2022 at 14:21
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase
Thanks for replys,

The voltage threw me out too.

I think maybe the 380/420 (I misread the plat ...		 27-10-2022 at 14:37
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase
Hello,

Can anyone give me their opinion on the generator in the picture (name plate).
Can I ob ...		 27-10-2022 at 02:49
by: yobbo II
Replicating Commercial EBW Gold Connection using LED

I think you only really need gold of you want corrosion resistance. Copper will do.
It could be t ...		 21-10-2022 at 17:35
by: yobbo II
Balance repair

at Sulaiman

Reading from your attached file:

For class E1 weights, the density of air should ...		 12-10-2022 at 15:56
by: yobbo II
Balance repair


Thanks for replys.

I have looked around the electronics but they are way beyond me.
I can pu ...		 12-10-2022 at 15:44
by: yobbo II
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